#!/usr/bin/env python3 """Updates FileCheck checks in MIR tests. This script is a utility to update MIR based tests with new FileCheck patterns. The checks added by this script will cover the entire body of each function it handles. Virtual registers used are given names via FileCheck patterns, so if you do want to check a subset of the body it should be straightforward to trim out the irrelevant parts. None of the YAML metadata will be checked, other than function names, and fixedStack if the --print-fixed-stack option is used. If there are multiple llc commands in a test, the full set of checks will be repeated for each different check pattern. Checks for patterns that are common between different commands will be left as-is by default, or removed if the --remove-common-prefixes flag is provided. """ from __future__ import print_function import argparse import collections import glob import os import re import subprocess import sys from UpdateTestChecks import common MIR_FUNC_NAME_RE = re.compile(r" *name: *(?P[A-Za-z0-9_.-]+)") MIR_BODY_BEGIN_RE = re.compile(r" *body: *\|") MIR_BASIC_BLOCK_RE = re.compile(r" *bb\.[0-9]+.*:$") VREG_RE = re.compile(r"(%[0-9]+)(?::[a-z0-9_]+)?(?:$[<>a-z0-9 ]+$)?") MI_FLAGS_STR = ( r"(frame-setup |frame-destroy |nnan |ninf |nsz |arcp |contract |afn " r"|reassoc |nuw |nsw |exact |nofpexcept |nomerge )*" ) VREG_DEF_FLAGS_STR = r"(?:dead )*" VREG_DEF_RE = re.compile( r"^ *(?P{2}{0}(?:, {2}{0})*) = " r"{1}(?P[A-Zt][A-Za-z0-9_]+)".format( VREG_RE.pattern, MI_FLAGS_STR, VREG_DEF_FLAGS_STR ) ) MIR_PREFIX_DATA_RE = re.compile(r"^ *(;|bb.[0-9].*: *$|[a-z]+:( |$)|$)") IR_FUNC_NAME_RE = re.compile( r"^\s*define\s+(?:internal\s+)?[^@]*@(?P[A-Za-z0-9_.]+)\s*\(" ) IR_PREFIX_DATA_RE = re.compile(r"^ *(;|$)") MIR_FUNC_RE = re.compile( r"^---$" r"\n" r"^ *name: *(?P[A-Za-z0-9_.-]+)$" r".*?" r"^ *fixedStack: *(\[\])? *\n" r"(?P.*?)\n?" r"^ *stack:" r".*?" r"^ *body: *\|\n" r"(?P.*?)\n" r"^\.\.\.$", flags=(re.M | re.S), ) class LLC: def __init__(self, bin): self.bin = bin def __call__(self, args, ir): if ir.endswith(".mir"): args = "{} -x mir".format(args) with open(ir) as ir_file: stdout = subprocess.check_output( "{} {}".format(self.bin, args), shell=True, stdin=ir_file ) if sys.version_info[0] > 2: stdout = stdout.decode() # Fix line endings to unix CR style. stdout = stdout.replace("\r\n", "\n") return stdout class Run: def __init__(self, prefixes, cmd_args, triple): self.prefixes = prefixes self.cmd_args = cmd_args self.triple = triple def __getitem__(self, index): return [self.prefixes, self.cmd_args, self.triple][index] def log(msg, verbose=True): if verbose: print(msg, file=sys.stderr) def find_triple_in_ir(lines, verbose=False): for l in lines: m = common.TRIPLE_IR_RE.match(l) if m: return m.group(1) return None def build_run_list(test, run_lines, verbose=False): run_list = [] all_prefixes = [] for l in run_lines: if "|" not in l: common.warn("Skipping unparsable RUN line: " + l) continue commands = [cmd.strip() for cmd in l.split("|", 1)] llc_cmd = commands[0] filecheck_cmd = commands[1] if len(commands) > 1 else "" common.verify_filecheck_prefixes(filecheck_cmd) if not llc_cmd.startswith("llc "): common.warn("Skipping non-llc RUN line: {}".format(l), test_file=test) continue if not filecheck_cmd.startswith("FileCheck "): common.warn( "Skipping non-FileChecked RUN line: {}".format(l), test_file=test ) continue triple = None m = common.TRIPLE_ARG_RE.search(llc_cmd) if m: triple = m.group(1) # If we find -march but not -mtriple, use that. m = common.MARCH_ARG_RE.search(llc_cmd) if m and not triple: triple = "{}--".format(m.group(1)) cmd_args = llc_cmd[len("llc") :].strip() cmd_args = cmd_args.replace("< %s", "").replace("%s", "").strip() check_prefixes = common.get_check_prefixes(filecheck_cmd) all_prefixes += check_prefixes run_list.append(Run(check_prefixes, cmd_args, triple)) # Sort prefixes that are shared between run lines before unshared prefixes. # This causes us to prefer printing shared prefixes. for run in run_list: run.prefixes.sort(key=lambda prefix: -all_prefixes.count(prefix)) return run_list def find_functions_with_one_bb(lines, verbose=False): result = [] cur_func = None bbs = 0 for line in lines: m = MIR_FUNC_NAME_RE.match(line) if m: if bbs == 1: result.append(cur_func) cur_func = m.group("func") bbs = 0 m = MIR_BASIC_BLOCK_RE.match(line) if m: bbs += 1 if bbs == 1: result.append(cur_func) return result class FunctionInfo: def __init__(self, body, fixedStack): self.body = body self.fixedStack = fixedStack def __eq__(self, other): if not isinstance(other, FunctionInfo): return False return self.body == other.body and self.fixedStack == other.fixedStack def build_function_info_dictionary( test, raw_tool_output, triple, prefixes, func_dict, verbose ): for m in MIR_FUNC_RE.finditer(raw_tool_output): func = m.group("func") fixedStack = m.group("fixedStack") body = m.group("body") if verbose: log("Processing function: {}".format(func)) for l in body.splitlines(): log(" {}".format(l)) # Vreg mangling mangled = [] vreg_map = {} for func_line in body.splitlines(keepends=True): m = VREG_DEF_RE.match(func_line) if m: for vreg in VREG_RE.finditer(m.group("vregs")): name = mangle_vreg(m.group("opcode"), vreg_map.values()) vreg_map[vreg.group(1)] = name func_line = func_line.replace( vreg.group(1), "[[{}:%[0-9]+]]".format(name), 1 ) for number, name in vreg_map.items(): func_line = re.sub( r"{}\b".format(number), "[[{}]]".format(name), func_line ) mangled.append(func_line) body = "".join(mangled) for prefix in prefixes: info = FunctionInfo(body, fixedStack) if func in func_dict[prefix]: if func_dict[prefix][func] != info: func_dict[prefix][func] = None else: func_dict[prefix][func] = info def add_checks_for_function( test, output_lines, run_list, func_dict, func_name, single_bb, args ): printed_prefixes = set() for run in run_list: for prefix in run.prefixes: if prefix in printed_prefixes: break if not func_dict[prefix][func_name]: continue # if printed_prefixes: # # Add some space between different check prefixes. # output_lines.append('') printed_prefixes.add(prefix) log("Adding {} lines for {}".format(prefix, func_name), args.verbose) add_check_lines( test, output_lines, prefix, func_name, single_bb, func_dict[prefix][func_name], args, ) break else: common.warn( "Found conflicting asm for function: {}".format(func_name), test_file=test, ) return output_lines def add_check_lines( test, output_lines, prefix, func_name, single_bb, func_info: FunctionInfo, args ): func_body = func_info.body.splitlines() if single_bb: # Don't bother checking the basic block label for a single BB func_body.pop(0) if not func_body: common.warn( "Function has no instructions to check: {}".format(func_name), test_file=test, ) return first_line = func_body[0] indent = len(first_line) - len(first_line.lstrip(" ")) # A check comment, indented the appropriate amount check = "{:>{}}; {}".format("", indent, prefix) output_lines.append("{}-LABEL: name: {}".format(check, func_name)) if args.print_fixed_stack: output_lines.append("{}: fixedStack:".format(check)) for stack_line in func_info.fixedStack.splitlines(): filecheck_directive = check + "-NEXT" output_lines.append("{}: {}".format(filecheck_directive, stack_line)) first_check = True for func_line in func_body: if not func_line.strip(): # The mir printer prints leading whitespace so we can't use CHECK-EMPTY: output_lines.append(check + "-NEXT: {{" + func_line + "$}}") continue filecheck_directive = check if first_check else check + "-NEXT" first_check = False check_line = "{}: {}".format(filecheck_directive, func_line[indent:]).rstrip() output_lines.append(check_line) def mangle_vreg(opcode, current_names): base = opcode # Simplify some common prefixes and suffixes if opcode.startswith("G_"): base = base[len("G_") :] if opcode.endswith("_PSEUDO"): base = base[: len("_PSEUDO")] # Shorten some common opcodes with long-ish names base = dict( IMPLICIT_DEF="DEF", GLOBAL_VALUE="GV", CONSTANT="C", FCONSTANT="C", MERGE_VALUES="MV", UNMERGE_VALUES="UV", INTRINSIC="INT", INTRINSIC_W_SIDE_EFFECTS="INT", INSERT_VECTOR_ELT="IVEC", EXTRACT_VECTOR_ELT="EVEC", SHUFFLE_VECTOR="SHUF", ).get(base, base) # Avoid ambiguity when opcodes end in numbers if len(base.rstrip("0123456789")) < len(base): base += "_" i = 0 for name in current_names: if name.rstrip("0123456789") == base: i += 1 if i: return "{}{}".format(base, i) return base def should_add_line_to_output(input_line, prefix_set): # Skip any check lines that we're handling. m = common.CHECK_RE.match(input_line) if m and m.group(1) in prefix_set: return False return True def update_test_file(args, test, autogenerated_note): with open(test) as fd: input_lines = [l.rstrip() for l in fd] triple_in_ir = find_triple_in_ir(input_lines, args.verbose) run_lines = common.find_run_lines(test, input_lines) run_list = build_run_list(test, run_lines, args.verbose) simple_functions = find_functions_with_one_bb(input_lines, args.verbose) func_dict = {} for run in run_list: for prefix in run.prefixes: func_dict.update({prefix: dict()}) for prefixes, llc_args, triple_in_cmd in run_list: log("Extracted LLC cmd: llc {}".format(llc_args), args.verbose) log("Extracted FileCheck prefixes: {}".format(prefixes), args.verbose) raw_tool_output = args.llc_binary(llc_args, test) if not triple_in_cmd and not triple_in_ir: common.warn("No triple found: skipping file", test_file=test) return build_function_info_dictionary( test, raw_tool_output, triple_in_cmd or triple_in_ir, prefixes, func_dict, args.verbose, ) state = "toplevel" func_name = None prefix_set = set([prefix for run in run_list for prefix in run.prefixes]) log("Rewriting FileCheck prefixes: {}".format(prefix_set), args.verbose) output_lines = [] output_lines.append(autogenerated_note) for input_line in input_lines: if input_line == autogenerated_note: continue if state == "toplevel": m = IR_FUNC_NAME_RE.match(input_line) if m: state = "ir function prefix" func_name = m.group("func") if input_line.rstrip("| \r\n") == "---": state = "document" output_lines.append(input_line) elif state == "document": m = MIR_FUNC_NAME_RE.match(input_line) if m: state = "mir function metadata" func_name = m.group("func") if input_line.strip() == "...": state = "toplevel" func_name = None if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) elif state == "mir function metadata": if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) m = MIR_BODY_BEGIN_RE.match(input_line) if m: if func_name in simple_functions: # If there's only one block, put the checks inside it state = "mir function prefix" continue state = "mir function body" add_checks_for_function( test, output_lines, run_list, func_dict, func_name, single_bb=False, args=args, ) elif state == "mir function prefix": m = MIR_PREFIX_DATA_RE.match(input_line) if not m: state = "mir function body" add_checks_for_function( test, output_lines, run_list, func_dict, func_name, single_bb=True, args=args, ) if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) elif state == "mir function body": if input_line.strip() == "...": state = "toplevel" func_name = None if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) elif state == "ir function prefix": m = IR_PREFIX_DATA_RE.match(input_line) if not m: state = "ir function body" add_checks_for_function( test, output_lines, run_list, func_dict, func_name, single_bb=False, args=args, ) if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) elif state == "ir function body": if input_line.strip() == "}": state = "toplevel" func_name = None if should_add_line_to_output(input_line, prefix_set): output_lines.append(input_line) log("Writing {} lines to {}...".format(len(output_lines), test), args.verbose) with open(test, "wb") as fd: fd.writelines(["{}\n".format(l).encode("utf-8") for l in output_lines]) def main(): parser = argparse.ArgumentParser( description=__doc__, formatter_class=argparse.RawTextHelpFormatter ) parser.add_argument( "--llc-binary", default="llc", type=LLC, help='The "llc" binary to generate the test case with', ) parser.add_argument( "--print-fixed-stack", action="store_true", help="Add check lines for fixedStack", ) parser.add_argument("tests", nargs="+") args = common.parse_commandline_args(parser) script_name = os.path.basename(__file__) for ti in common.itertests(args.tests, parser, script_name="utils/" + script_name): try: update_test_file(ti.args, ti.path, ti.test_autogenerated_note) except Exception: common.warn("Error processing file", test_file=ti.path) raise if __name__ == "__main__": main()